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confile: add getter for lxc.cgroup{.*}

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2017-05-31 06:23:45 +02:00
parent 4203a0b51d
commit b863bf92ac
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GPG Key ID: 8EB056D53EECB12D
1 changed files with 44 additions and 40 deletions
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84
src/lxc/confile.c
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@ -89,6 +89,8 @@ static int set_config_lsm_se_context(const char *, const char *, struct lxc_conf
static int get_config_lsm_se_context(struct lxc_container *, const char *, char *, int);
static int set_config_cgroup(const char *, const char *, struct lxc_conf *);
static int get_config_cgroup(struct lxc_container *, const char *, char *, int);
static int set_config_idmap(const char *, const char *, struct lxc_conf *);
static int set_config_loglevel(const char *, const char *, struct lxc_conf *);
static int set_config_logfile(const char *, const char *, struct lxc_conf *);
@ -150,7 +152,7 @@ static struct lxc_config_t config[] = {
{ "lxc.aa_profile", set_config_lsm_aa_profile, get_config_lsm_aa_profile, NULL},
{ "lxc.aa_allow_incomplete", set_config_lsm_aa_incomplete, get_config_lsm_aa_incomplete, NULL},
{ "lxc.se_context", set_config_lsm_se_context, get_config_lsm_se_context, NULL},
{ "lxc.cgroup", set_config_cgroup, NULL, NULL},
{ "lxc.cgroup", set_config_cgroup, get_config_cgroup, NULL},
{ "lxc.id_map", set_config_idmap, NULL, NULL},
{ "lxc.loglevel", set_config_loglevel, NULL, NULL},
{ "lxc.logfile", set_config_logfile, NULL, NULL},
@ -2595,41 +2597,6 @@ static inline int lxc_get_conf_int(struct lxc_conf *c, char *retv, int inlen,
return snprintf(retv, inlen, "%d", v);
}
/*
* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list,
* then just the value(s) will be printed. Since there still could be
* more than one, it is newline-separated.
* (Maybe that's ambigous, since some values, i.e. devices.list, will
* already have newlines?)
* If you ask for 'lxc.cgroup", then all cgroup entries will be printed,
* in 'lxc.cgroup.subsystem.key = value' format.
*/
static int lxc_get_cgroup_entry(struct lxc_conf *c, char *retv, int inlen,
const char *key)
{
int fulllen = 0, len;
int all = 0;
struct lxc_list *it;
if (!retv)
inlen = 0;
else
memset(retv, 0, inlen);
if (strcmp(key, "all") == 0)
all = 1;
lxc_list_for_each(it, &c->cgroup) {
struct lxc_cgroup *cg = it->elem;
if (all) {
strprint(retv, inlen, "lxc.cgroup.%s = %s\n", cg->subsystem, cg->value);
} else if (strcmp(cg->subsystem, key) == 0) {
strprint(retv, inlen, "%s\n", cg->value);
}
}
return fulllen;
}
/*
* If you ask for a specific value, i.e. lxc.limit.nofile, then just the value
* will be printed. If you ask for 'lxc.limit', then all limit entries will be
@ -3024,10 +2991,6 @@ int lxc_get_config_item(struct lxc_conf *c, const char *key, char *retv,
v = c->logfile;
else if (strcmp(key, "lxc.loglevel") == 0)
v = lxc_log_priority_to_string(c->loglevel);
else if (strcmp(key, "lxc.cgroup") == 0) // all cgroup info
return lxc_get_cgroup_entry(c, retv, inlen, "all");
else if (strncmp(key, "lxc.cgroup.", 11) == 0) // specific cgroup info
return lxc_get_cgroup_entry(c, retv, inlen, key + 11);
else if (strcmp(key, "lxc.utsname") == 0)
v = c->utsname ? c->utsname->nodename : NULL;
else if (strcmp(key, "lxc.console.logfile") == 0)
@ -3749,3 +3712,44 @@ static int get_config_lsm_se_context(struct lxc_container *c, const char *key,
{
return lxc_get_conf_str(retv, inlen, c->lxc_conf->lsm_se_context);
}
/*
* If you ask for a specific cgroup value, i.e. lxc.cgroup.devices.list,
* then just the value(s) will be printed. Since there still could be
* more than one, it is newline-separated.
* (Maybe that's ambigous, since some values, i.e. devices.list, will
* already have newlines?)
* If you ask for 'lxc.cgroup", then all cgroup entries will be printed,
* in 'lxc.cgroup.subsystem.key = value' format.
*/
static int get_config_cgroup(struct lxc_container *c, const char *key,
char *retv, int inlen)
{
struct lxc_list *it;
int len;
int fulllen = 0;
bool get_all = false;
if (!retv)
inlen = 0;
else
memset(retv, 0, inlen);
if (!strcmp(key, "lxc.cgroup"))
get_all = true;
else if (!strncmp(key, "lxc.cgroup.", 11))
key += 11;
else
return -1;
lxc_list_for_each(it, &c->lxc_conf->cgroup) {
struct lxc_cgroup *cg = it->elem;
if (get_all) {
strprint(retv, inlen, "lxc.cgroup.%s = %s\n", cg->subsystem, cg->value);
} else if (!strcmp(cg->subsystem, key)) {
strprint(retv, inlen, "%s\n", cg->value);
}
}
return fulllen;
}